Why GPS Speed Changes by Environment
GPS speed quality is highly dependent on the environment around your device. Knowing where errors happen helps you interpret readings correctly.
High-confidence conditions
- Open roads with clear sky and minimal obstructions.
- Steady movement with fewer rapid direction changes.
- Device with unrestricted location access.
Low-confidence conditions
- Tunnels and parking structures with poor satellite visibility.
- Urban canyons where reflections can cause multipath errors.
- Heavy weather and signal blockage from terrain.
In low-confidence zones, use trends and averages instead of reacting to every short-term speed jump.